Hydraulic dumping attachment for trucks



Sept. 23, 1952 Filed NOV. 2, 1948 E. L. STOCKWELL HYDRAULIC DUMPINGATTACHMENT FOR TRUCKS 5 sheets-sheet 2 ,l Inventor E /mer L.-5ockwe//WWW 25M@ Sept. 23, 1952 E 1 STQCKWELL 2,611,641

HYDRAULIC DUMPING ATTACHMENT FOR TRUCKS Filed Nov. 2, 194s ssheets-sheet 5 Inventar Fig. 3 Elmer L. Sfockwe/l y Patented Sept. 23,1952 STAT-Es PATENT OFFICE 1 y HYDnAULIof Dum-'INGl ATTACHMENT; Y nonTRUcKs y ElmerrInSltockwell, GraybullsWyo.

Applica-tionNvember 2, 1948,' Serial'N 517;.843"

lfifClaims'.. 1.

This invention4 relates toimeansffor tiltingor dumping# vthe body# ofconventional" dumpz. trucks and is=- especially adapted 'f'or employmentwith.v a particular'- dumptri-ick,` commonlyA referred to. as, a sugarbeetI truclr.` This-type oftruck" is used by" farmers-toetransport;sugar beets and other similarr pro'duceit'oa sugar renery The trucksemployed mustbe designed for side dumping;wth theaid offv a-hcistingfmechanism provided at refinery receiving stations: However; itrepresentsa-n` additional-'expense-and burden on the farmer' toen-aveatruclf thati'can only: be dumped using anv outside actuatingA agent,as. the truclr-thenvcannotbe conveniently employed for tran-sporting'tasti-'s1aroundthe farma Thus, it, is the primaryf-'purpose ofthefinstant' invention to enable. the; truck-body to be dumpedor tilted .bymeans carriedf-bytheftrnck andfoperatedlthereby. More -partieu-larly;itfis-lth'ef object" of this invention to provideeaA hydraulic. liftingstructure for attachmentftoithe truck frame and dump body Aof theYsugar' beet truck;

Parallleiirig thev above object; otherl objects of the 1 instant?inventioi-i:A arerfto provide' means ,ior

attacliingf the hydraulic lifting 1 structure to. l the truclifinar-radjustabl'e manner for controlling the lift'angfle oftiiebody;inza dependable'andr sturdy manner topreventl the bodyvfrom twistingwhen lifted l and? to: avoiddamaging'` strains or stresses being:impartedtofatheirame; inalposition to pro vide maximum1 tra-velmovementNof 'the hydraulic lifting. structure within vazminirnurn Aof space; andin a substantially verticahinoperative positionbelwveenftheiraifrieanrztibcldy;A sot as to obtainA a maximum: liftL andyetV maintain properroad' clearance.

oftransporti-ng theisugarbeets or similar'produce;Theltruckl-'framefincludes theconventional longitudinally-v` extendingmernbersl upon which arem'ountecta plurality of "cross frame members;

Thebodyfis=conventionally made ofA Woodv and is 1 on the sills; and arespaced in parallelism` to,

This invention can-beVY easily attached t-othe foregoing standardtruckstructure' withoutany altera-ti'ons'-A or the structure.- The inventionincludes twin compound*V hydraulic cylinders-5 or lifting jacks,lpivotallyI attachedl to" the frame members and' to` the cross vbracesNorrthe-A dump body; each ofl thep ivotcpoints -being'-braced-;-andstrengtheneda The jacksA arepivota-lly-4 attached' to a bracket,which-is securely hookedover-'the topv of the sil-ls; sotliat-the entireload is carried' by the frame.v Theftilti'ng stress is absorbed Aby thecross braces of the dump body, the-cylinder ramsor lifting rods; being*`pivote@ to`V bracket members securedbetweenthe-cross bracesroi the body.Aconventionfal pum-p, actuated by a-standard power take-off unit` andcontrol valve 'is em ployedin associationvwi-th aestandardfluid' 4 eir-Icuit to raise-andi lowery the-lifting: ifa-msi These and ancillary: objeetsand structural features oil merit are attained'by-'tlfiis-invention;a preferred-embodiment ofV which isset' forth in the followingdescription and" illustrated in the ac'- companying drawings; wherein:

Figure 1 isaperspecti-veview of astandarcl beet Y truck, illustratingthedumpibedy inY a tilted' or liftedposition, withhydraulic-liftingmeans; con-v structed. andattached. in accordance" with the principles..of4 thisg invention; assoeiatedwitlr the frame. and' body;

Figure; 2; isi aV fragmentary-f perspective viewv of the; body: and:framaa. illustrating-l in. perspectiv the; instant. invention Figure 3;isfa Verticallsectionalfzviewf offthe: hydraulic cylinder; in;itsfully.' collapsed; rest: position; v

Figureifis-fa View partlysirrelevation:anpartly' in section asf. takenon line` lr-4Q; of

Figure 5.- is a; vertical sectional detail.Y View;` taken.A on line-5f-5 i of Eigllre, 3;;

Figure.- 6A is; a. horiznI-itaLl sectional; detail; view taken `on..line le-iofiliigurer Referring now to.- they drawings; yand?partieu-1Vlarly, to. Figurer, L thereof; as conventional-v. andstandardbeetxtruck, generallydesignatedbyt-thev character referencellis,.il1ustratedamalincludes` a cab Ld. andiconventional. motor, anddriving. structuranotshown. Astandardrameprojects rearwardly from4 the;cab, and' includes longie tudinally extending framemembersor sillsIttand. I @secured together by means Oi cleatsor brackets 2'0',1 themember |182 being-superimposed;onthe; member I6 andforming oneoLtl-iefside frames` 221 The other side frame 214" isj formed! in a,similar manner and'extend'sparallel' with the Side framehr 22. A,plurality' of transverse Y.supporting..

members or braces 26 are mounted on the side members 22 and 24 andarranged in longitudinal spacement thereon. The transverse supportingmembers 26 have their respective opposed ends projected outwardly beyondthe side members. The truck body 28 includes a floor structure 39 fromwhich extend upraised side walls 32 and end walls 34, the walls beingformed of a plurality of horizontal slats joined by vertical staymembers 35. The side walls are preferably hinged so that they arecapable of being lowered. The floor or underside of the body 30 isprovided with cross braces or bar members 33, which are arranged inpairs spaced apart, each pair, 4S, 42 and 44, being adapted to occupy aposition on each side of one of the cross frame members 20, when thebody is in its normal lowered' and travelling position.

The body is tiltably associated with the frame and, in this respect, thebody is pivoted to the frame at one of its longitudinal side edges, sothat the body tilts sideways with respect to the frame. The cross framemembers 20 are provided with longitudinally aligned openings 45, formedin their extending ends -to receive a pivot rod 40 which extends throughlongitudinally registered or aligned openings 50 in the transverse bodybrace members. As seen in Figure l, the body can be raised and loweredabout the pivot rod 48 tilting sideways to deliver a load at the side ofthe truck.

The foregoing structure briefly defines a standard beet truck, to whichthe instant invention is attached for raising and lowering the body withrespect to the frame. Thus, twin hydraulic jacks 2' or hoistingcylinders 52 and 54 are pivotally sus-` pended upon the frame andpivotally associated with the body for raising and lowering the same.The hydraulic hoisting means includes hydraulic jacks each comprising acylinder B supported pivotally at its lower end and inner and outertelescoping piston sections or rams 58 and 60. The type of hydraulichoist, including the cylinders and nested piston elements isconventional per se, the outer piston 58 being slidable in the cylinder,while the inner piston slides Within the outer piston during telescopicmovement of the pistons. The inner piston at its outer end is pivoted tothe body so that a pivotal or universal connection between eachhydraulic jack and the body and frame is obtained. A flexible conduitB2, associated with a fluid circuit or system and connected to aconventional pump, operated by a conventional power take-01T, not shown,is threadingly engaged in an internally threaded nipple 64 formed on thecylinder 56, adjacent the lower end thereof. Of course, conventionalrings 66 are provided between the inner and outer piston elements andalso, conventional packing glands 68 are secured at the outer ends ofthe cylinder and inner and outer pistons by fastening means 10.

Means is provided for securely and pivotally supporting the cylinder 50to one of the side members, preferably the side member 22. In thisrespect, a bracket member '12, substantially L- shaped and having aflat, vertically extending section 'I4 and a lateral end extension 'I6is provided. The bracket is provided with parallel opposed side walls'I8 and 80 and is secured to the body sills by seating the lateral end'l5 on the top of the sill or side frame member 22. A plate 82 isdisposed on the outer surface of the side member to secure the bracketto the side member and brace the same in its attached placement. Forthis purpose, bolts 84 are inserted transversely through the section 14of the bracket and through the frame member and the bracing plate 82with locking nuts 80 received on the extending end of the bolts. Theopposed side walls 18 and 80 depend below the sills and are adapted topivotally support the lower end of the cylinder 56. In this respect, aU-shaped bracket or supporting member 08 is pivoted to the lower ends ofthe side walls, the parallel ends thereof being pivoted byrivets orPivot pins thereto. The cylinder 56 has its lower closed end securelymounted on the medial portion of the bracket 8B. A bracket or retainingmember 92 is secured by the members 90 'around a portion of thecircumference of the cylinder to retain the same in the proper position.It is to be noted that the cylinder is normally retained in a verticalposition as shown in Figure 3 when the body is seatedon the frame, thepiston elements being nested in the cylinder and the same receivedbetween the side walls 'I8 and 80 of the bracket. Thus, the jacks areguided in their raising and lowering movements 'and are held in avertical plane by the side walls, preventing binding of the pivots 00.

The inner piston B0 has a transverse sleeve or collar 94 disposed-at itsupper closed end, the collar being rotatably and concentrically mountedon a pin 96. The pin 96 is supported by a pair of angular brackets 98and |00 between the cross braces 38. It is to be noted that additionalcross braces 02 and |04 are secured to the body in parallelism with thesets 42 and 44 and secured adjacent to one of the members thereof. Thisis not an essential modification of the standard body structure butallows of a more proper placement of the jacks with respect to the body.Thus the angular brackets are secured, as seen in Figure 4 to the bracemember 102 and one of the members of the set 42. The angular bracketsare bolted to the bottom of the members and have inclined sides |06 andIDS vertically disposed therebetween. The pin 96 is journaled in alignedapertures formed in the extending ends of the sides and secured thereinby enlarged ends.

It is to be here noted that the angular brackets can be adjusted on themembers with respect to the pivoted side of the body, the placementthereof controlling the angle of tilt of the body. Thus the nearer tothe pivot point that the brackets are placed to receive the innerpiston, the higher the body will tilt.

When it is desired to dump the body, to deposit the load of sugar beetor the like produce on the ground along side of the truck, the followingoperation takes place. Pressure is forced into the cylinder through theexible line 02, forcing the piston section 58 upwardly and outwardly andmoving the inner piston 54 upwardly and outwardly thereof, the innerpiston sliding in the outer piston. It is to be noted that during theinitial movement, the cylinder 56 moves around the pivot point 90 andassumes a position in an inclined plane relative to the pivoted side ofthe body, as the inner pistons move outwardly from the cylinder. Thus,under the pressure admitted through the cylinder, the piston sectionsmove outwardly therefrom and the inner piston pivots around the pin 96moving the body to its maximum inclined position. The load thengravitates downwardly toward the lower pivoted end of the body and movesthrough the hinged side thereon.

In the reversed direction to return the body to its normal position onthe frame, the pressure fluid is allowed t0 escape from the cylinder,back M through the conduit 622, allowing the body to returnbygravityontothe-frame, the weight of the; body eiecting' the return thereof aboutitspivot point" 48;

Thus., it can be seen that there is provided an efcierrt` andnovelAattachment for a dump-truck, having a ti'ltabllelbody and` stationaryfra-me. It is to beparticularly pointedl out that thezwei'ght ofthe-body; during its raisi-ngfand'loweringlmovee ments, isborne-entirel'ylby the side frame mem'- bers; whilethe lifting stress isabsorbed by the cross' bra-ces' onn the` bottom on the-body; Thetwincom-pound hoisting cylindersA or `rj acks- 52 and 542 canbe-positionedat anypointlongitudinally ontlieside1 members; butA it' ispreferred-tto attach thesame on eithersides `of the-'conventionaldri-vingjwheels for the frame.

Whiletheinstant inventionv has been disclosed; as applied to aparticular type of truck,l having av side' delivery; it4 isto beunderstoodf that the same may' beA employed with an end delivery truck;the novel'- meansofl attaching the jacks being adaptable for attachmentto'anyl standardsupporting' frameandbodybrace members.

Thus,l it is-to'be understood furtherthatf cer'- tain other embodimentscan be carried out, as coming within the spirit' and" scope@ of' theappended claims;

Having'describedftlfrerinvention, what is claimed as new is:

1. In a dump.. truck; inoluding-airame having longitudinally extendingopposed. side bars and a. dump body supported on said` sidelbars andpivoted to one of the side bars for tilting about a longitudinal v axis,a hoist mechanism including a pair: oi plates secured to theother ofsaidsid'e. bars andextending below. the; side bar', arsup.- porting,`member. pivotedto the lower endslof the plates and includingaholder;aihydraulic. cylinder having itslower end seatedfon andsecured to thelsupporting member and received within saidholderga-piston rodoperatively mountedi in the cylinder andmeans for pivotally securing theouterlendlofthe rodto-the underside of thebody.

2`. In combinationwithae dump truck including a framehavinglongitudinally'extending opposed side members and a body pivotedat one of its longitudinal sides to one-of-said' frame sidemem'- bers,saidbody having spaced pairs of transverse bracebars'4 on the lower'surfaceof the door of thebody, means-forraising the body about its pivotcomprising hydraulic jacks pivotally supported at their lower ends onthe other of said frame side members, said pivoted ends being disposedbelow the side members and adapted to move transversely thereof andpivotally secured at their upper ends between the brace bars of thebody, said jacks being normally supported by the frame in a verticalposition and adapted to move into an extended position in a planevertically inclined to the frame.

3. In combination with a dump truck including a frame havinglongitudinally extending opposed side members and a body pivoted at oneof its longitudinal sides to one of said frame side members, said bodyhaving spaced pairs of transverse brace bars on the lower surface of thefloor of the body, means for raising the body about its pivot comprisinghydraulic jacks pivotally supported at their lower ends on the other ofsaid frame side members, said pivoted ends being disposed below the sidemembers and adapted to move transversely thereof and pivotally securedat their upper ends between the brace bars of the body, said jacks beingnormally supported by the frame in a verticali position and adapted tomove int'oan extended position inA a plane-vertically'Y inclined to theframe; said? upper: ends of the tacks being' longitudinally' adjustable;on the brace-bars for ad'usting the-tilting angle: of ther f body. i

45. Irrcombinati'onl with adump truck including a framefhaving'longitudinally lextending opposed-f side; members` and i a body pivotedat one' of its;

longitudinalsides tcrone'oifsaid frame -side mem-V bers, said"ibedyhavingspaced pairs of transverse brace bars on the lower surfacer ofthe door ofi thebody; mea-ns fr raising' the. body about its pivoti`comprising hydraulic jacks pivotally sup-- ported? at theirlower" endson the other oi said frame side members, said pivotedendsbeing dis-Aposedi belowJ the side members andadapted tomove# transversely' thereofvand pivotally secured'. atl theinupper' endsv between the bracey bars obthe body; saidS jackslbeing normally supportedby.v the frame a verticalposition and adapted tof move an; extended position ink av plane verti=Acally inclined to the frame, bracket members hookcdl on the; frame sidemembers, the lower endsoff the jacks bei-'ng' pivotally supported; bysaid brackets, an'dmeans-=-formedonfsaidbrackets for' preventingbinding' o the pivot` 5% combination witha'. dump'- trucki body havinga'I frame; a body pivotally mounted oir-the frame albngsa longitudinalaxisaatfone sid'e'- offthe frame,` theL frame-1 having longitudinallyextend-- ing opposed? side-L members, the body beingproxvided with"spacedy pai-rsl off transversebracef bars on the lower sur-face ofthe-hoor, bracketlmemberssecured on thei-sidefmemberf opposite tothatupon. which thebody' is 1 pivotally mounted; hy`

draulic cylinders pivotally supported at their lower' ends by= saidlbracket Amembers.,` inner and outer: piston elementsextensibly' carried?by said cylinders', brackets adjustably secured` tu said body bracebars,andmeansfor pivotally attach-- ingsaid inner pistonelements to saidbracketse 6. In a1 dump truck' including a framel'iav-ing longitudinallyextending opposed sidel members andi av body having spaced pairs oftransverse bracebars onrtlieilower-surface-of the'floor,y saidbody-'being' pivotally securedil atv one of its sides to' onez ofthesidemembers-ofv thelira-me; bracket member-'s1 secured i onthe-otherkof saidsid'evv members', hydraulic cylinders pivotally supported atvtheirlowerends by: said bracket members, inner and outer piston elementsextensibly' carried by said cylinders, brackets adjustably secured tosaid body brace bars, means for pivotally attaching said inner pistonelements to said brackets, said last-named means including a sleevetransversely formed on the outer ends of the inner piston elements, anda rod carried by the brackets, said sleeve being rotatably journaled onthe rod.

'7. In a dump truck including a frame having longitudinally extendingopposed side members and a body having spaced pairs of transverse bracebars on the lower surface of the door, said body being pivotally securedat one of its sides to one of the side members of the frame; bracketmembers secured on the other of said side members, hydraulic cylinderspivotally supported at their lower ends by said bracket members, innerand outer piston elements extensibly carried by said cylinders, bracketsadjustably secured to said body brace bars, means for pivotallyattaching said inner piston elements to said brackets, a rod carried bysaid brackets, and a sleeve-rotatably journaled on the rod andtransversely formed on the outer ends of the inner piston elements,

8. In combination with a dump truck including a frame havinglongitudinally extending opposed side bars and a dump body supported onsaid side bars and pivotally secured to one of the side bars for tiltingabout a longitudinal axis therethrough, a pair of transverse parallelbrace bars on the undersurface of the iioor of the body, a cross framemember mounted upon said frame and adapted to be straddled by said bracebars, a third brace bar on the undersurface of said body parallel tosaid pair of brace bars, means for effecting pivoting movement betweenthe dump body and the frame, said means including a support secured tothe other of said side bars and having opposed lower ends disposed belowthe side bar, a holder pivoted to the ends of the support, a cylinderhaving its lower end seated on the holder, a piston operatively mountedin the cylinder and means for pivotally attaching the outer end of thepiston to the third brace bar and the adjacent one of said pair ofparallel brace bars.

9. A hoist mechanism for tilting a dump truck body about its pivotalaxis on a truck frame of the type having a pair of side members and abar secured to each side member of the frame; comprising a supportsecured to the top of a bar and extending below the bar and its sidemember, a cylinder, means pivotally connecting the lower ends of thecylinder and the support, a piston rod operatively mounted in thecylinder, a sleeve mounted upon and extending transversely or the outerend of the piston rod, a bracket secured to the underside of the truckbody and a bearing member carried by the bracket'for receiving thesleeve.

10. In combination with a dump truck including a frame havinglongitudinally extending op posed side bars and a dump body supported onsaid side bars and pvoted to one `of the side bars for tilting about alongitudinal axis, a hoist mechanism includingr a support lsecured tothe other of said side bars and having opposed lower ends disposed belowthe side bar, a holder pivoted to the ends of the support, a cylinderhaving its lower end seated on the holder, a piston operatively mountedin the cylinder and means for pivotally attaching the outer end of thepiston to the body, a retaining member secured to said opposed lower endof the holder and partially embracing said cylinder.

11. The combination of claim 10 wherein said retaining member and saidholder are provided with common pivot means securing them to said lowerends.

12. A side dumping truck comprising a chassis and a dump body, a crossmember secured upon and extending transversely of said chassis, a pairof parallel brace bars secured to the underside of the truck body anddisposed upon opposite sides of said cross member and pivoted thereto atone end thereof for vertical pivoting movement of the body, a thirdbrace bar parallel to said pair of hars and secured to said truck body,a lifting jack pivotally connected to said chassis, a bracket secured tosaid third brace bar and to that one of said pair of brace bars which isadjacent to said third brace bar, said lifting jack being pivoted tosaid bracket.

13. The combination of claim 12 wherein said jack is so connected to thechassis and body as to lie in a vertical position when the body islowered upon the chassis.

14. The combination of claim 12 wherein said bracket comprises a centraltransverse rod and a pair of hangers at the end thereof, the jack beingjournaled upon the rods, each of said hangers being secured to one ofsaid brace bars,

EIMER L. STOCKl/VELL.

REFERENCES CITED The following references are of record in the :le ofthis patent:

UNITED STATES PA'I'ENTS Number Name Date 1,392,107 Berry Sept. 27, 19211,744,897v Hughes Jan. 28, 1930 1,921,917 Flowers Aug. 8, 1933 2,023,700Rodler Dec. 10, 1935 2,142,089 Barrett Jan. 3, 1939 2,321,406 MerchantJune 8, 1943 2,437,890 Orendori Mar. 16, 1948 2,440,559 Reichman Apr.27, 1948 2,517,716 Rolf et al. Aug. 8, 1950 FOREIGN PATENTS NumberCountry Date 70,680 Austria Dec. 10, 1915 644,158 France May 29, 1928605,880 Germany Nov, 20, 1934

